NIOS TMA Environmental Science (333) Tutor Marked Assignment 2021PK Kapri & Co.
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Check Your Questions Papers and Instructions below: Environmental Science (333) Tutor Marked Assignment Session 2020-21 (Environmental Science-333) -12th Class
Note : (i) All questions are compulsory. The marks allotted for each question are given beside the questions.
(ii) Write your name enrollment numbers, AI name subject on the top of the first page of the answer sheet.
(1) Answer any one of the following questions in about 40-60 words.
(a) Name the discovery that enabled the primitive humans to colonise colder parts of the earth. Mention one more advantage that primitive humans derived from the discovery
(b) Given below are some of the important facts in the origin and evolution of life on earth. Arrange them in the correct sequence.
(i) Oxidizing atmosphere.
(ii) Simplest non-photosynthetic bacteria evolved.
(iii) Earth cooled and molecules of life formed.
(iv) Chlorophyll contained bacteria originated.
(2) Answer any one out of the following questions in about 40 to 60 words.
(a) Why is there a need to be develop a buffer or transtional zone around a natural ecosystem?
(b) Your neighbour wants to start aquaculture as a profession/occupation. To encourage him, tell him about any four of its advantages.
(3) Answer any one out of the following questions in about 40 to 60 words.
(a) Rural and urban settlements differ from each other in many ways. Write difference between rural and urban settlements with reference to:
(ii) Population density.
(b) Being a good homemaker/housewife, which four eco-friendly fuels would you use at your home to prevent indoor air pollution? Also give any two reasons for opting for these fuels?
(4) Answer any one out of the following questions in about 100 to 150 words.
(a) Although high yielding plant varieties have helped to increase our food production capacity, but it has also played an important role in soil degradation. Explain this in your own thoughts/opinion.
(b) A dairy farm owner gives harmonal injection to his livestocks (Milching animals) in order to facilitate to increase milk production. Name the chemical injected and also mention its adverse effects on the live stocks.
(5) Answer any one out of the following questions in about 100 to 150 words.
(a) IUCN is a Non-Government Organisation (NGO) which is independent of governments. How does it work in order to tackle our environmental issues ?
(b) What is the importance of environmental ethics in our lives? Explain in four sentences.
(6) Prepare any one project out of the following projects given below.
(a) Obtain mushroom seeds and grow mushrooms, prepare your own compost and spawning. Make observation on the growth of mushroom culture and note the time taken till ready of mushrooms. At the end of doing this, write a brief report. You can take help from internet as well as your elders.
(b) Go out to a nearby field and collect some leguminous plants. Observe their roots carefully. Write your observations and draw the diagram of these roots. Prepare a report regarding the cause of the development of nodules as well as its significance. Draw a simplified flow chart of biochemical steps involved in this process.